JP2007169719A - Aluminum alloy sheet for planographic printing plate, and its manufacturing method - Google Patents
Aluminum alloy sheet for planographic printing plate, and its manufacturing method Download PDFInfo
- Publication number
- JP2007169719A JP2007169719A JP2005369166A JP2005369166A JP2007169719A JP 2007169719 A JP2007169719 A JP 2007169719A JP 2005369166 A JP2005369166 A JP 2005369166A JP 2005369166 A JP2005369166 A JP 2005369166A JP 2007169719 A JP2007169719 A JP 2007169719A
- Authority
- JP
- Japan
- Prior art keywords
- rolling
- plate
- aluminum alloy
- hot
- less
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 60
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 19
- 238000005096 rolling process Methods 0.000 claims abstract description 55
- 238000011282 treatment Methods 0.000 claims abstract description 55
- 239000013078 crystal Substances 0.000 claims abstract description 49
- 238000001953 recrystallisation Methods 0.000 claims abstract description 22
- 238000005097 cold rolling Methods 0.000 claims abstract description 14
- 238000000137 annealing Methods 0.000 claims abstract description 12
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims description 27
- 229910052802 copper Inorganic materials 0.000 claims description 5
- 239000012535 impurity Substances 0.000 claims description 4
- 229910052738 indium Inorganic materials 0.000 claims 1
- 238000005098 hot rolling Methods 0.000 abstract description 27
- 230000001105 regulatory effect Effects 0.000 abstract description 5
- 230000003746 surface roughness Effects 0.000 abstract 1
- 238000007788 roughening Methods 0.000 description 45
- 238000005530 etching Methods 0.000 description 11
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 6
- 239000002253 acid Substances 0.000 description 6
- 238000001816 cooling Methods 0.000 description 6
- 239000000203 mixture Substances 0.000 description 6
- 239000003513 alkali Substances 0.000 description 5
- 238000012545 processing Methods 0.000 description 5
- 238000004381 surface treatment Methods 0.000 description 5
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 4
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 4
- 239000002585 base Substances 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 4
- 230000007547 defect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 229910017604 nitric acid Inorganic materials 0.000 description 4
- WMFOQBRAJBCJND-UHFFFAOYSA-M Lithium hydroxide Chemical compound [Li+].[OH-] WMFOQBRAJBCJND-UHFFFAOYSA-M 0.000 description 3
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 3
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 238000007743 anodising Methods 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 3
- 239000003792 electrolyte Substances 0.000 description 3
- 238000000265 homogenisation Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 229910018191 Al—Fe—Si Inorganic materials 0.000 description 2
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- KRVSOGSZCMJSLX-UHFFFAOYSA-L chromic acid Substances O[Cr](O)(=O)=O KRVSOGSZCMJSLX-UHFFFAOYSA-L 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- AWJWCTOOIBYHON-UHFFFAOYSA-N furo[3,4-b]pyrazine-5,7-dione Chemical compound C1=CN=C2C(=O)OC(=O)C2=N1 AWJWCTOOIBYHON-UHFFFAOYSA-N 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 238000005482 strain hardening Methods 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 229910018084 Al-Fe Inorganic materials 0.000 description 1
- 229910018192 Al—Fe Inorganic materials 0.000 description 1
- 229910018575 Al—Ti Inorganic materials 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 239000004115 Sodium Silicate Substances 0.000 description 1
- ANBBXQWFNXMHLD-UHFFFAOYSA-N aluminum;sodium;oxygen(2-) Chemical compound [O-2].[O-2].[Na+].[Al+3] ANBBXQWFNXMHLD-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000002048 anodisation reaction Methods 0.000 description 1
- SRSXLGNVWSONIS-UHFFFAOYSA-N benzenesulfonic acid Chemical compound OS(=O)(=O)C1=CC=CC=C1 SRSXLGNVWSONIS-UHFFFAOYSA-N 0.000 description 1
- 229940092714 benzenesulfonic acid Drugs 0.000 description 1
- 239000003518 caustics Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000002848 electrochemical method Methods 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 238000000866 electrolytic etching Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000004313 glare Effects 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000010297 mechanical methods and process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- LNOPIUAQISRISI-UHFFFAOYSA-N n'-hydroxy-2-propan-2-ylsulfonylethanimidamide Chemical compound CC(C)S(=O)(=O)CC(N)=NO LNOPIUAQISRISI-UHFFFAOYSA-N 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 235000006408 oxalic acid Nutrition 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229910001388 sodium aluminate Inorganic materials 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 235000011121 sodium hydroxide Nutrition 0.000 description 1
- 235000019795 sodium metasilicate Nutrition 0.000 description 1
- 239000001488 sodium phosphate Substances 0.000 description 1
- 229910000162 sodium phosphate Inorganic materials 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 229910052911 sodium silicate Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Printing Plates And Materials Therefor (AREA)
Abstract
Description
この発明は、粗面化処理を施したアルミニウム合金板表面に陽極酸化処理を施し、さらに感光性物質を塗布して形成される平版印刷版に使用されるアルミニウム合金板に関するものであって、より詳しくは、粗面化処理後の外観の均一性に優れた平版印刷版用アルミニウム合金板およびその製造方法に関するものである。 The present invention relates to an aluminum alloy plate used for a lithographic printing plate formed by anodizing the surface of a roughened aluminum alloy plate and further applying a photosensitive material, Specifically, the present invention relates to an aluminum alloy plate for a lithographic printing plate excellent in uniformity in appearance after the surface roughening treatment and a method for producing the same.
従来、平版印刷版としては、粗面化処理、陽極酸化皮膜処理などの表面処理を施したアルミニウム板上に感光性物質を塗布したものが用いられている。この中で最も広く用いられているものは、あらかじめ感光性物質を塗布しておき、直ちに焼付けられる状態になっているいわゆるPS版である。このような平版印刷版に画像露光、現像、水洗、ラッカー盛り等の製版処理を施して印刷版が得られるが、このような現像処理による未溶解の感光層の部分は画像部を形成し、一方感光層が除去されてその下のアルマイト表面が露出した部分は親水性のため水受容部となり、非画像部を形成する。これを印刷機の回転する円筒形版胴に巻付け、湿し水の存在のもとにインキを画像部上に付着させゴムブランケットに転写し、紙面に印刷している。 Conventionally, as a lithographic printing plate, a photosensitive material is applied on an aluminum plate that has been subjected to a surface treatment such as a roughening treatment or an anodized film treatment. The most widely used is a so-called PS plate in which a photosensitive material is applied in advance and is ready to be baked. Such a lithographic printing plate is subjected to plate making processes such as image exposure, development, washing, lacquering, etc. to obtain a printing plate, but the part of the undissolved photosensitive layer by such development processing forms an image part, On the other hand, the portion where the photosensitive layer is removed and the underlying anodized surface is hydrophilic becomes a water-receiving portion because it is hydrophilic and forms a non-image portion. This is wound around a rotating cylindrical plate cylinder of a printing machine, and ink is deposited on the image area in the presence of fountain solution, transferred to a rubber blanket, and printed on a paper surface.
従来このような用途のアルミニウムおよびアルミニウム合金(以下総称してアルミニウム合金とする)板には、JIS1050、JIS1100、JIS3003等のアルミニウム合金が主として用いられている。通常これらのアルミニウム合金板は、表面を機械的方法、化学的方法および電気化学的方法のいずれか一つ、あるいは二つ以上が組合わされた工程による粗面化方法により粗面化し、その後通常は陽極酸化処理を施して、平版印刷版用として使用される。 Conventionally, aluminum alloys such as JIS1050, JIS1100, and JIS3003 are mainly used for aluminum and aluminum alloy (hereinafter collectively referred to as aluminum alloy) plates for such applications. Usually, these aluminum alloy plates are roughened by a roughening method using a mechanical method, a chemical method, an electrochemical method, or a combination of two or more. Anodized and used for lithographic printing plates.
以上のような平版印刷版用アルミニウム合金板には、次のような特性が強く要求されている。 The following characteristics are strongly required for the aluminum alloy plate for a lithographic printing plate as described above.
すなわち、感光剤の被着を均一にして密着性を高め、かつ印刷中の湿し水の管理を容易にするため、粗面化処理により均一な粗面が容易に得られることが重要である。 That is, it is important that a uniform rough surface can be easily obtained by a roughening process in order to improve the adhesion by uniformly applying the photosensitive agent and facilitate the management of dampening water during printing. .
しかしながら前述のような従来の平版印刷版用アルミニウム合金板のうち、JIS1050アルミニウム合金板は、粗面化処理により均一な粗面が得られるものの、耐熱軟化性に劣る欠点があり、またJIS1100、JIS3003アルミニウム合金板は、粗面化処理により不均一な粗面となってしまう問題があった。すなわちJIS1100、JIS3003アルミニウム合金板は、板の圧延方向に沿って細かい筋状の模様(いわゆるストリーク)が発生し、粗面化処理によってピット形状が不均一となり、部分的にエッチング不足の箇所が点在し、版板としては好ましくはない粗面形状を生じてしまう。 However, among the conventional lithographic printing plate aluminum alloy plates as described above, the JIS 1050 aluminum alloy plate has a disadvantage that it is inferior in heat-resistant softening property, although a uniform rough surface can be obtained by the roughening treatment, and JIS 1100 and JIS 3003. The aluminum alloy plate has a problem that it becomes a non-uniform rough surface by the roughening treatment. In other words, JIS1100 and JIS3003 aluminum alloy plates have fine streak patterns (so-called streaks) along the rolling direction of the plate, the pit shape becomes non-uniform due to the roughening treatment, and portions where etching is partially insufficient are pointed. Therefore, a rough surface shape which is not preferable as a plate is produced.
これらの問題に対しては、既に熱間圧延後の平均冷却速度を規定することにより、粗面化処理面後の外観均一性、耐焼鈍軟化性を解決した例がある(例えば特許文献1参照)。 For these problems, there is an example in which the appearance uniformity after the roughening treatment surface and the annealing softening resistance are solved by prescribing the average cooling rate after hot rolling (see, for example, Patent Document 1). ).
またFeおよびSiを含有するアルミニウム合金板を、板表面の結晶粒の平均粒径および同一結晶面を有する集合体サイズを規定することにより、グレインストリークやエッチング特性を解決した例がある(例えば特許文献2参照)。 In addition, there is an example in which grain streak and etching characteristics are solved by defining an average particle size of crystal grains on the surface of the aluminum alloy plate containing Fe and Si and an aggregate size having the same crystal plane (for example, patents) Reference 2).
前述のような特許文献1に示される方法では、粗面化処理後の外観の均一性、耐焼鈍軟化性について、ある程度の解決は図られているが、未だ充分とは言えず、また熱間圧延板の段階で板表面の結晶方位につき所要のキューブ方位占有率を得ることができず、そのため粗面化処理後のギラギラ感が強くなって、外観が不均一となる等の問題があることが判明した。 In the method shown in Patent Document 1 as described above, some degree of solution has been achieved for the uniformity of the appearance after the roughening treatment and the softening resistance against annealing, but it cannot be said that it is sufficient, and The required cube orientation occupancy cannot be obtained for the crystal orientation of the plate surface at the stage of the rolled plate, so that there is a problem that the glare feeling after the roughening treatment becomes stronger and the appearance becomes uneven. There was found.
一方、特許文献2に示される方法では、耐ストリークス性やエッチング特性について、ある程度の向上が図られてはいるが、未だ充分とは言えず、またこの特許文献2における結晶粒径の規定では、粗面化処理後に面質不具合が発生する等の問題がある。 On the other hand, although the method shown in Patent Document 2 has improved streaks resistance and etching characteristics to some extent, it cannot be said that it is sufficient yet. There is a problem that surface quality defects occur after the surface roughening treatment.
この発明は以上の事情を背景としてなされたもので、粗面化処理によって均一な粗面を確実かつ容易に得ることができ、ストリークや面質ムラ、処理ムラ等の発生を招くことなく、均一な外観が確実かつ安定して得られる平版印刷版用アルミニウム合金板およびその製造方法を提供することを課題としている。 The present invention has been made against the background described above, and a uniform rough surface can be obtained reliably and easily by the roughening treatment, and it is uniform without causing the occurrence of streaks, uneven surface quality, uneven processing, etc. It is an object of the present invention to provide an aluminum alloy plate for a lithographic printing plate and a method for producing the same that can provide a stable and stable appearance.
本発明者等は、前述のような課題を解決するべく鋭意実験・研究を重ねた結果、合金の成分組成を適切に調整するばかりでなく、製造プロセス中における再結晶処理直後の板表面の結晶方位密度を適切に制御するとともに、製品板の結晶粒の粒径、面積率を適切に制御することによって、前述の課題を解決し得ることを見出し、この発明をなすに至った。 As a result of intensive experiments and researches to solve the above-mentioned problems, the present inventors have not only appropriately adjusted the composition of the alloy composition but also the crystal on the plate surface immediately after the recrystallization process during the manufacturing process. The inventors have found that the above-mentioned problems can be solved by appropriately controlling the orientation density and appropriately controlling the grain size and area ratio of the crystal grains of the product plate, and have made the present invention.
具体的には、請求項1の発明は、Fe0.1〜0.5%、Si0.05〜0.20%、Cu0.005〜0.07%、Ti0.005〜0.08%を含有し、残部がAlおよび不可避的不純物よりなるアルミニウム合金からなり、再結晶処理を含むプロセスにより製造された平版印刷版用アルミニウム合金板において、再結晶直後の板表面の結晶方位におけるキューブ方位密度占有率が10%以上であり、かつ製品板の結晶粒の平均面積が0.1mm2以下であり、しかも結晶粒の圧延方向と平行な方向の平均長さが1300μm以下であることを特徴とするものである。 Specifically, the invention of claim 1 contains Fe 0.1-0.5%, Si 0.05-0.20%, Cu 0.005-0.07%, Ti 0.005-0.08%. In the aluminum alloy plate for a lithographic printing plate made of an aluminum alloy consisting of Al and inevitable impurities, and including a recrystallization process, the cube orientation density occupancy in the crystal orientation of the plate surface immediately after recrystallization is 10% or more, the average area of the crystal grains of the product plate is 0.1 mm 2 or less, and the average length in the direction parallel to the rolling direction of the crystal grains is 1300 μm or less. is there.
また請求項2の発明は、結晶粒の圧延方向と垂直な方向の平均長さが100μm以下であることを特徴とするものである。 The invention of claim 2 is characterized in that the average length in the direction perpendicular to the rolling direction of the crystal grains is 100 μm or less.
一方請求項3の発明の平版印刷版用アルミニウム合金板の製造方法は、Fe0.1〜0.5%、Si0.05〜0.20%、Cu0.005〜0.07%、Ti0.005〜0.08%を含有し、残部がAlおよび不可避的不純物よりなるアルミニウム合金の鋳塊に、熱間粗圧延および熱間仕上げ圧延からなる熱間圧延を施すにあたり、熱間仕上げ圧延の圧下量を、熱間粗圧延上り板厚ta(mm)と熱間仕上げ圧延上り板厚tb(mm)との比ta/tbが、
ta/tb>10
以上を満足するように規制し、かつ熱間仕上げ圧延上り板厚tbが1.2〜4.0mmの範囲内、熱間仕上げ圧延上り温度が300〜360℃の範囲内となるように熱間圧延して再結晶を生起させ、しかも熱間仕上げ圧延直後から300℃未満の温度域まで板温度が降下する時間を4時間以内に規制して、再結晶後の板表面の結晶方位におけるキューブ方位密度占有率が10%以上である熱延板を得、その後、中間焼鈍を施すことなく冷間圧延により製品板厚とし、これによって結晶粒の平均面積が0.1mm2以下であり、しかも結晶粒の圧延方向と平行な方向の平均長さが1300μm以下のアルミニウム合金板を得ることを特徴とするものである。
On the other hand, the method for producing an aluminum alloy plate for a lithographic printing plate of the invention of claim 3 comprises Fe 0.1 to 0.5%, Si 0.05 to 0.20%, Cu 0.005 to 0.07%, Ti 0.005 to When performing hot rolling consisting of hot rough rolling and hot finish rolling on an ingot of aluminum alloy containing 0.08% and the balance consisting of Al and inevitable impurities, the reduction amount of hot finish rolling is set to The ratio ta / tb between the hot rough rolled up board thickness ta (mm) and the hot finish rolled up board thickness tb (mm) is
ta / tb> 10
It is controlled so as to satisfy the above, and the hot finish rolled up thickness tb is in the range of 1.2 to 4.0 mm, and the hot finish rolled up temperature is in the range of 300 to 360 ° C. Cube orientation in the crystal orientation of the plate surface after recrystallization is controlled by controlling the time for the plate temperature to fall within 4 hours from immediately after hot finish rolling to a temperature range of less than 300 ° C. A hot-rolled sheet having a density occupancy of 10% or more is obtained, and then the product sheet thickness is obtained by cold rolling without intermediate annealing, whereby the average area of crystal grains is 0.1 mm 2 or less, and the crystal An aluminum alloy plate having an average length in the direction parallel to the rolling direction of the grains of 1300 μm or less is obtained.
さらに請求項4の発明は、請求項3に記載の平版印刷版用アルミニウム合金板の製造方法において、結晶粒の平均面積率が0.1mm2以下であり、しかも結晶粒の圧延方向と平行な方向の平均長さが1300μm以下でかつ結晶粒の圧延方向と垂直な方向の平均長さが100μm以下のアルミニウム合金板を得ることを特徴とするものである。 Further, the invention of claim 4 is the method for producing an aluminum alloy plate for a lithographic printing plate according to claim 3, wherein the average area ratio of the crystal grains is 0.1 mm 2 or less and parallel to the rolling direction of the crystal grains. An aluminum alloy sheet having an average length in the direction of 1300 μm or less and an average length in a direction perpendicular to the rolling direction of the crystal grains of 100 μm or less is obtained.
請求項1、請求項2の発明の平版印刷版用アルミニウム合金板は、粗面化処理後の外観としてストリークの発生や面質ムラ、処理ムラ等の発生がなく、外観の均一性が確実かつ安定して優れた、平版印刷版支持体として極めて良好な性能、商品価値を有している。 The aluminum alloy plate for a lithographic printing plate according to the first and second aspects of the present invention is free of streak, surface quality unevenness, processing unevenness, etc. as the appearance after the roughening treatment, and the appearance is uniform and reliable. It has excellent performance and commercial value as a lithographic printing plate support that is stable and excellent.
また請求項3、請求項4の発明の製造方法によれば、上述のような優れた性能、商品価値を有する平版印刷版用アルミニウム合金板が確実かつ安定して得られるばかりでなく、熱間圧延後の中間焼鈍を省略することにより、工程数減少、省エネルギにより低コスト化を図ることができる。 Moreover, according to the manufacturing method of the invention of Claim 3 and Claim 4, not only the above-mentioned excellent performance and commercial value aluminum alloy plate for a lithographic printing plate can be obtained reliably and stably, but also hot By omitting the intermediate annealing after rolling, the cost can be reduced by reducing the number of steps and saving energy.
以下、この発明について、詳細に説明する。 The present invention will be described in detail below.
先ずこの発明で用いるアルミニウム合金成分組成限定理由について説明する。 First, the reasons for limiting the composition of the aluminum alloy component used in the present invention will be described.
Fe:0.1〜0.5%
Fe量が0.1%未満では、再結晶時の結晶粒径が粗大となって粗面化処理により生成されるピットが不均一となって、粗面化処理後の外観に面質ムラが発生し、外観が不均一となる。一方Fe量が0.5%を越えれば、Al−Fe系、Al−Fe−Si系の粗大化合物が多量に生成されて、粗面化処理後のピットが不均一となり、前記同様に粗面化処理後の外観不均一が生じる。そのためFe量は0.1〜0.5%の範囲とした。
Fe: 0.1 to 0.5%
If the amount of Fe is less than 0.1%, the crystal grain size at the time of recrystallization becomes coarse, and the pits generated by the roughening treatment become non-uniform, resulting in uneven surface quality on the appearance after the roughening treatment. Occurs and the appearance becomes uneven. On the other hand, if the amount of Fe exceeds 0.5%, a large amount of Al-Fe-based and Al-Fe-Si-based coarse compounds are generated, and the pits after the surface roughening treatment become non-uniform. Appearance non-uniformity after crystallization treatment occurs. Therefore, the amount of Fe is set in the range of 0.1 to 0.5%.
Si:0.05〜0.20%
Si量が0.05%未満では、粗面化処理後のピットが不均一となることから、粗面化処理後に面質ムラが発生し、外観が不均一となる。またSi量が0.20%を越えれば、Al−Fe−Si系の粗大化合物が多量に生成されて、粗面化処理後のピットが不均一となって、粗面化処理後に面質ムラが生じ、外観が不均一となり、また耐熱軟化性も低下し、さらには過酷インキ汚れ性も低下する。そのためSi量は0.05〜0.20%の範囲内とした。
Si: 0.05-0.20%
If the amount of Si is less than 0.05%, the pits after the surface roughening treatment are non-uniform, so that surface unevenness occurs after the surface roughening treatment and the appearance is non-uniform. On the other hand, if the amount of Si exceeds 0.20%, a large amount of Al-Fe-Si coarse compounds are produced, and the pits after the surface roughening treatment become non-uniform, resulting in uneven surface quality after the surface roughening treatment. And the appearance becomes uneven, the heat softening resistance is lowered, and the severe ink stain resistance is also lowered. Therefore, the Si amount is set in the range of 0.05 to 0.20%.
Cu:0.005〜0.07%
Cuは電解グレーニング性に大きな影響を及ぼす元素である。Cu量が0.005%未満では、粗面化処理後のピットが不均一になり、前記同様に外観不均一となる。一方Cu量が0.07%を越えても粗面化処理後のピットが不均一となり、また粗面化処理後の色調が黒味を帯びすぎて商品価値を損なう。そのためCu量は0.005〜0.07%の範囲内とした。
Cu: 0.005-0.07%
Cu is an element that greatly affects the electrolytic graining property. If the amount of Cu is less than 0.005%, the pits after the surface roughening treatment become non-uniform, and the appearance becomes non-uniform as described above. On the other hand, even if the amount of Cu exceeds 0.07%, the pits after the surface roughening treatment become non-uniform, and the color tone after the surface roughening treatment becomes too blackish, thereby impairing the commercial value. Therefore, the amount of Cu is set within a range of 0.005 to 0.07%.
Ti:0.005〜0.08%
Tiも電解グレーニング性に大きな影響を及ぼし、またアルミニウム合金鋳塊の組織状態にも大きな影響を及ぼす元素である。Ti量が0.005%未満では、粗面化処理後のピットが不均一になり、また鋳塊の結晶粒が微細化されずに粗大な結晶粒組織になるため、マクロ組織に圧延方向に沿う帯状の筋が発生して、粗面化処理後にも帯状の筋が残存し、平版印刷版用支持体として好ましくなくなる。一方Ti量が0.08%を越えれば、上記効果が飽和するばかりでなく、粗大なAl−Ti系化合物が形成されてその化合物が圧延板に筋状に分布し、その結果陽極酸化皮膜に欠陥が生じ、感光層の欠陥となって、きれいな印刷が困難となる。そのためTi量は0.005〜0.08%の範囲内とした。
Ti: 0.005-0.08%
Ti is an element that has a great influence on the electrolytic graining property and also has a great influence on the structure of the aluminum alloy ingot. If the amount of Ti is less than 0.005%, the pits after the surface roughening treatment become non-uniform, and the crystal grains of the ingot are not refined and become a coarse crystal grain structure. A band-shaped streak is generated, and the strip-shaped streak remains after the roughening treatment, which is not preferable as a support for a lithographic printing plate. On the other hand, if the amount of Ti exceeds 0.08%, not only the above effect is saturated, but also a coarse Al-Ti compound is formed and the compound is distributed in a streak pattern on the rolled plate, and as a result, an anodized film is formed. Defects occur, resulting in defects in the photosensitive layer, making it difficult to print cleanly. Therefore, the Ti amount is set in the range of 0.005 to 0.08%.
なお一般にアルミニウム合金板においては、鋳塊結晶組織を微細化して圧延板のキメ、ストリークを防止するため、少量のTiを単独で、または微量のBと組合せて添加することがあり、この発明の平版印刷版用アルミニウム合金においても、Tiとともに微量のBを添加することは許容される。但しB量が1ppm未満では、上記の効果が得られず、一方B量が50ppmを越えればBの添加効果が飽和するばかりでなく、粗大なTiB2粒子による線状欠陥が生じやすくなるから、Bを添加する場合のB添加量は、1〜50ppmの範囲内とすることが好ましい。 In general, in an aluminum alloy plate, a small amount of Ti may be added alone or in combination with a small amount of B in order to refine the ingot crystal structure and prevent texture and streak of the rolled plate. Even in the aluminum alloy for lithographic printing plates, it is permissible to add a trace amount of B together with Ti. However, if the amount of B is less than 1 ppm, the above effect cannot be obtained. On the other hand, if the amount of B exceeds 50 ppm, not only the addition effect of B is saturated, but also linear defects due to coarse TiB 2 particles tend to occur. When B is added, the amount of B added is preferably in the range of 1 to 50 ppm.
この発明の平版印刷版用アルミニウム合金板においては、合金の成分組成を前述のように調整するだけではなく、製造プロセス中における再結晶直後の結晶方位を適切に調整すると同時に、最終板厚の製品板における結晶粒条件(粒径、面積率)を適切に調整することが重要である。 In the aluminum alloy plate for a lithographic printing plate according to the present invention, not only the composition of the alloy is adjusted as described above, but also the crystal orientation immediately after recrystallization during the manufacturing process is adjusted appropriately, and at the same time the final plate thickness product It is important to properly adjust the crystal grain conditions (grain size, area ratio) in the plate.
すなわち一般に平版印刷版用アルミニウム合金板の製造プロセスでは、その中途において単独で、あるいは他の工程と兼ねて再結晶処理を行なうのが通常であり、この発明の平版印刷版用アルミニウム合金板を製造するにあたっても、その製造プロセス中途で再結晶処理が行なわれることを前提としている。そしてこの発明では、再結晶処理の直後の板表面の結晶方位密度について、キューブ(Cube)方位密度の占有率が10%以上であることを必須としている。ここで、再結晶直後のキューブ方位密度占有率が10%未満では、平版印刷版用アルミニウム合金板として粗面化処理後の粗面にギラギラ感が強くなり、検査ラインにおいて傷と誤認してしまうおそれが強い。また再結晶処理直後のキューブ方位密度占有率の上限は特に規制しないが、それ以上のキューブ方位占有率を得るためには更なる強圧下を与える必要があり、そのため特殊な圧延設備が必要となってしまうから、通常は60%以下とする。 That is, in general, in the manufacturing process of an aluminum alloy plate for a lithographic printing plate, it is usual to perform recrystallization treatment alone or in combination with other steps, and the aluminum alloy plate for a lithographic printing plate of the present invention is manufactured. In this case, it is assumed that the recrystallization process is performed during the manufacturing process. In the present invention, the occupancy of the cube orientation density is 10% or more for the crystal orientation density on the plate surface immediately after the recrystallization treatment. Here, if the cube orientation density occupancy immediately after recrystallization is less than 10%, the rough surface after the roughening treatment as an aluminum alloy plate for a lithographic printing plate becomes more glaring and misidentified as a scratch on the inspection line. There is a strong fear. In addition, the upper limit of the cube orientation density occupancy immediately after the recrystallization treatment is not particularly restricted, but in order to obtain a higher cube orientation occupancy, it is necessary to give a further strong reduction, and thus special rolling equipment is required. Therefore, it is usually set to 60% or less.
なお請求項1の発明の平版印刷版用アルミニウム合金板の製造プロセスとしては、再結晶処理は、いずれの段階に行なっても良いが、通常は熱間圧延時の熱を利用して熱間圧延からその後の冷却過程にかけて自己焼鈍により再結晶させることが望ましい。すなわち請求項1で規定しているように、熱間圧延条件を適切に規制することによって、自己焼鈍により熱延板に再結晶を生起させることが望ましく、この場合には熱間圧延の後に改めて加熱したり冷間圧延の中途で加熱したりするいわゆる中間焼鈍を省くことができ、そのため工程の簡略化、省エネルギを図ることができる。 In addition, as a manufacturing process of the aluminum alloy plate for a lithographic printing plate according to the invention of claim 1, the recrystallization treatment may be performed at any stage, but usually, hot rolling is performed using heat during hot rolling. It is desirable to recrystallize by self-annealing during the subsequent cooling process. That is, as prescribed in claim 1, it is desirable to cause recrystallization in the hot-rolled sheet by self-annealing by appropriately regulating the hot rolling conditions. In this case, the hot rolling is performed again after hot rolling. So-called intermediate annealing in which heating is performed or in the middle of cold rolling can be omitted, so that the process can be simplified and energy can be saved.
一方、製品板の結晶組織(粒径、面積率)については、先ず第1には、板表面の結晶粒の平均面積を0.1mm2以下の範囲内とする必要がある。平均面積が0.1mm2を越えれば、粗面化処理後の外観に面質ムラや処理ムラが発生し、外観不均一となる恐れがある。また板表面における結晶粒の圧延方向と平行な方向の平均長さを1300μm以下の範囲内とする必要がある。圧延方向平均長さが1300μmを越える粗大な結晶粒となれば、粗面化処理後の外観に面質ムラが発生し、外観不均一となるおそれがある。さらに、板表面における結晶粒の圧延方向と垂直な方向の平均長さは、請求項2、請求項4で規定しているように、100μm以下の範囲内とすることが望ましい。圧延垂直方向平均長さが100μmを越えれば、前記と同様に粗面化処理後の外観に面質ムラが発生して、外観不均一となるおそれがある。 On the other hand, regarding the crystal structure (particle size, area ratio) of the product plate, first, it is necessary to first set the average area of crystal grains on the plate surface within a range of 0.1 mm 2 or less. If the average area exceeds 0.1 mm 2 , surface quality unevenness and processing unevenness may occur in the appearance after the roughening treatment, and the appearance may be uneven. Moreover, it is necessary to make the average length of the direction parallel to the rolling direction of the crystal grain in the plate surface within the range of 1300 micrometers or less. If the average grain length in the rolling direction exceeds 1300 μm, the surface appearance may be uneven in the appearance after the surface roughening treatment and the appearance may be uneven. Furthermore, the average length in the direction perpendicular to the rolling direction of the crystal grains on the plate surface is preferably within a range of 100 μm or less as defined in claims 2 and 4. If the average length in the vertical direction of rolling exceeds 100 μm, surface quality unevenness may occur in the appearance after the surface roughening treatment as described above, and the appearance may become uneven.
以上のように、この発明の平版印刷版用アルミニウム合金板においては、再結晶処理直後の結晶方位条件、および製品板における結晶粒条件を適切に調整することによって、粗面化処理後の外観が均一なものを確実かつ安定して得ることができるのである。 As described above, in the aluminum alloy plate for a lithographic printing plate according to the present invention, by appropriately adjusting the crystal orientation conditions immediately after the recrystallization treatment and the crystal grain conditions in the product plate, the appearance after the roughening treatment can be improved. A uniform product can be obtained reliably and stably.
次にこの発明の平版印刷版用アルミニウム合金板の製造方法について説明する。 Next, the manufacturing method of the aluminum alloy plate for planographic printing plates of this invention is demonstrated.
先ず前述のような成分組成のアルミニウム合金を、常法に従ってDC鋳造法等により鋳造し、得られた鋳塊に対して必要に応じて均質化処理を施してから熱間圧延を行なう。均質化処理の条件は特に規定しないが、通常は500〜620℃で1〜10時間保持とすれば良い。 First, an aluminum alloy having the above-described component composition is cast by a DC casting method or the like according to a conventional method, and the obtained ingot is subjected to a homogenization treatment as necessary, followed by hot rolling. The conditions for the homogenization treatment are not particularly defined, but it is usually sufficient to hold at 500 to 620 ° C for 1 to 10 hours.
熱間圧延は、熱間粗圧延および熱間仕上げ圧延を組合せて行なう。そして熱間圧延の条件としては、熱間仕上げ圧延の圧下量を、熱間粗圧延上り板厚ta(単位:mm)および熱間仕上げ圧延上り板厚tb(単位:mm)に応じて
ta/tb>10
が満たされるように定めるとともに、熱間仕上げ圧延上り板厚tbを1.2〜4.0mmの範囲内、熱間仕上げ圧延上り温度を300〜360℃の範囲内に規制して、熱間圧延からその直後の冷却過程の間で再結晶を生起させる必要があり、さらに熱間仕上げ圧延直後から300℃未満の温度域に板温度が低下するまでの間の時間を4時間以内に規制する必要がある。
Hot rolling is performed by combining hot rough rolling and hot finish rolling. And as conditions of hot rolling, the amount of reduction of hot finish rolling is set according to hot rough rolling up board thickness ta (unit: mm) and hot finish rolling up board thickness tb (unit: mm).
ta / tb> 10
Is satisfied, and the hot finish rolling up thickness tb is regulated within the range of 1.2 to 4.0 mm and the hot finish rolling up temperature is regulated within the range of 300 to 360 ° C. It is necessary to cause recrystallization during the cooling process immediately after that, and furthermore, it is necessary to regulate the time from immediately after hot finish rolling until the plate temperature falls to a temperature range of less than 300 ° C. within 4 hours. There is.
これらの熱間圧延条件を定めた理由は次の通りである。 The reason for determining these hot rolling conditions is as follows.
先ず熱間仕上げ圧延の圧下量については、熱間粗圧延上り板厚taと熱間仕上げ圧延上り板厚tbとの比ta/tbが10を越えるように相対的に大きな圧下量とすることにより、熱延板組織を微細にして、製品板について粗面化処理後の外観を均一化する効果が得られる。ta/tbの値が10以下の場合には、熱延板の再結晶粒が粗大化して、粗面化処理後の外観に面質ムラが生じ、外観不均一となる。 First, the reduction amount of the hot finish rolling is set to a relatively large reduction amount so that the ratio ta / tb of the hot rough rolling up strip thickness ta and the hot finish rolling up strip thickness tb exceeds 10. The effect of making the hot-rolled sheet structure fine and uniforming the appearance of the product plate after the roughening treatment can be obtained. When the value of ta / tb is 10 or less, the recrystallized grains of the hot-rolled sheet are coarsened, resulting in uneven surface quality in the appearance after the surface roughening treatment, and the appearance is not uniform.
次に、熱間仕上げ圧延板厚は1.2〜4.0mmの範囲内とする。 Next, the hot finish rolled sheet thickness is set in a range of 1.2 to 4.0 mm.
ここで、熱間圧延上り板厚が1.2mmより小さい場合には、熱間圧延後に冷間圧延により所定の製品板厚にした際、冷間圧延による加工硬化による素板強度の上昇が充分に得られないため、製品板が強度不足となり、一方熱間圧延上り板厚が4.0mmより大きい場合には、熱間圧延後に冷間圧延により所定の製品板厚にした際、冷間圧延による加工硬化によって素板強度が高くなり過ぎてしまう。このように素板強度が高過ぎれば、PS版として円筒形版胴に巻きつける際に板切れが生じてしまうおそれがある。したがって適切な強度を得るために、熱間仕上げ圧延上り板厚を1.2〜4.0mmの範囲内とする。 Here, in the case where the hot rolled up plate thickness is smaller than 1.2 mm, when the predetermined product plate thickness is obtained by cold rolling after hot rolling, the strength of the base plate is sufficiently increased by work hardening by cold rolling. In the case where the product sheet becomes insufficient in strength and the thickness of the hot rolled up sheet is larger than 4.0 mm, cold rolling is performed when a predetermined product sheet thickness is obtained by cold rolling after hot rolling. The strength of the base plate becomes too high due to the work hardening caused by. If the base plate strength is too high in this way, the plate may be cut when wound around the cylindrical plate cylinder as a PS plate. Therefore, in order to obtain an appropriate strength, the hot finish rolled up plate thickness is set within a range of 1.2 to 4.0 mm.
さらに熱間圧延上り温度は、300〜360℃の範囲内とする。熱間圧延上り温度が300℃より低温になれば、熱延板断面で充分に再結晶せずに未再結晶が残存して、素板強度が高くなり過ぎる。またこの場合、熱延板表面にも未再結晶部が残存してしまって、粗面化処理後の外観としてストリークが発生して、外観不均一となるおそれがある。一方、熱間圧延上り温度が360℃を越える高温になれば、再結晶粒が粗大化して、この場合も粗面化処理後の外観が不均一になる。したがって適切に再結晶を生起させて、外観不均一の発生を防止しかつ適切な強度を得るためには、熱間圧延上り温度を300〜360℃の範囲内とする必要がある。なおこの範囲内でも特に310〜350℃の範囲内が好ましい。 Further, the hot rolling up temperature is set in the range of 300 to 360 ° C. If the hot rolling ascending temperature is lower than 300 ° C., unrecrystallized remains without being sufficiently recrystallized in the hot rolled sheet cross section, and the base plate strength becomes too high. Further, in this case, an unrecrystallized portion remains on the surface of the hot-rolled sheet, and streaks may occur as an appearance after the roughening treatment, resulting in a non-uniform appearance. On the other hand, when the hot rolling ascending temperature is higher than 360 ° C., the recrystallized grains become coarse, and in this case also, the appearance after the roughening treatment becomes non-uniform. Therefore, in order to appropriately cause recrystallization, prevent occurrence of non-uniform appearance and obtain an appropriate strength, it is necessary to set the hot rolling up temperature within a range of 300 to 360 ° C. Even within this range, the range of 310 to 350 ° C. is particularly preferable.
さらに、熱間仕上げ圧延直後の300〜360℃の範囲内の温度から、熱間圧延後の冷却により300℃未満の温度域に達するまでの時間は4時間以内とする。この時間が4時間を越える長時間となれば、再結晶粒が過度に粒成長して粗大化し、粗面化処理後の外観が不均一となる。したがって外観不均一の発生を避けるためには、熱間仕上げ圧延直後から300℃未満の温度域までの時間(冷却時間)を4時間以内とする必要がある。なおこの時間の下限は特に定めないが、通常は再結晶を完全に終了させる等の観点から、2時間以上とすることが望ましい。 Furthermore, the time from the temperature in the range of 300 to 360 ° C. immediately after hot finish rolling to the temperature range of less than 300 ° C. due to cooling after hot rolling is within 4 hours. If this time exceeds 4 hours, the recrystallized grains grow excessively and become coarse, and the appearance after the roughening treatment becomes non-uniform. Therefore, in order to avoid the occurrence of non-uniform appearance, it is necessary to set the time (cooling time) from immediately after hot finish rolling to a temperature range below 300 ° C. within 4 hours. The lower limit of this time is not particularly defined, but usually it is preferably 2 hours or more from the viewpoint of complete recrystallization.
以上のような条件以外の熱間圧延条件は特に限定されるものではなく、常法の条件に従えば良く、例えば熱間粗圧延開始温度は400〜600℃程度とすれば良い。 Hot rolling conditions other than the above conditions are not particularly limited, and may be according to ordinary conditions. For example, the hot rough rolling start temperature may be about 400 to 600 ° C.
前述のような条件を満たすようにして熱間圧延を施して300℃未満の温度域、例えば室温まで冷却した熱延板は、板表面の結晶方位密度条件として、既に述べたようにキューブ方位密度占有率10%以上を満たすことが可能となる。 A hot-rolled sheet that has been hot-rolled so as to satisfy the above-described conditions and cooled to a temperature range of less than 300 ° C., for example, room temperature, has a cube orientation density as described above as the crystal orientation density condition of the plate surface. It becomes possible to satisfy the occupation ratio of 10% or more.
以上のような熱間圧延により得られた熱延板に対しては、その後、中間焼鈍を施すことなく冷間圧延により所定の板厚に仕上げる。すなわち、請求項3で規定する製造方法では、熱間圧延からその後の冷却にかけての段階で再結晶を生起させているため、熱間圧延後(あるいは冷間圧延の中途)に改めて中間焼鈍を施す必要がない。冷間圧延の条件は特に規定しないが、通常は圧下率80〜98%程度とすれば良い。 The hot-rolled sheet obtained by hot rolling as described above is then finished to a predetermined thickness by cold rolling without intermediate annealing. That is, in the manufacturing method defined in claim 3, since recrystallization occurs in the stage from hot rolling to subsequent cooling, intermediate annealing is performed again after hot rolling (or in the middle of cold rolling). There is no need. The conditions for cold rolling are not particularly specified, but usually the rolling reduction may be about 80 to 98%.
以上のようにして得られた製品板としては、その結晶粒組織として既に述べたような結晶粒条件(粒径、面積率)を満たすことができる。 The product plate obtained as described above can satisfy the crystal grain conditions (grain size and area ratio) already described as the crystal grain structure.
このようにして得られた平版印刷版用アルミニウム合金板(製品板)を実際に平版印刷版支持体とするためには、粗面化等のための表面処理を施す。この表面処理方法は、特に限定されるものではなく、常法に従えば良いが、代表的な表面処理方法について以下に説明する。 In order to actually use the thus obtained lithographic printing plate aluminum alloy plate (product plate) as a lithographic printing plate support, surface treatment for roughening or the like is performed. The surface treatment method is not particularly limited, and may follow a conventional method. A typical surface treatment method will be described below.
粗面化のための表面処理方法としては、塩酸または硝酸電解液中で電気化学的に砂目立てする電気化学的粗面化処理方法、およびアルミニウム表面を金属ワイヤーでひっかくワイヤーブラシグレイン法、研磨球と研磨剤でアルミニウム表面を砂目立てするボールグレイン法、ナイロンブラシと研磨剤で表面を粗面化するブラシグレイン法のような機械的粗面化法などを用いることができ、上記いずれの粗面化方法も、単独あるいは組み合わせて用いることもできる。 Surface treatment methods for surface roughening include electrochemical surface roughening treatment using electrochemical graining in hydrochloric acid or nitric acid electrolyte, wire brush grain method, grinding ball with metal wire. Any of the above rough surfaces can be used, such as a ball grain method in which the aluminum surface is grained with an abrasive and an abrasive, or a mechanical graining method such as a brush grain method in which the surface is roughened with a nylon brush and an abrasive. The method of making can also be used alone or in combination.
このように粗面化処理したアルミニウム合金板に対しては、さらに粗面化の第2段階として、酸またはアルカリにより化学的にエッチングするのが通常である。酸をエッチング剤として用いる場合は、微細構造を破棄するのに長時間を要するため、工業的に不利となるが、アルカリをエッチング剤として用いることにより改善できる。エッチングのためのアルカリ剤としては、苛性ソーダ、炭酸ソーダ、アルミン酸ソーダ、メタケイ酸ソーダ、リン酸ソーダ、水酸化カリウム、水酸化リチウム等を用いることができ、またその濃度と温度の好ましい範囲はそれぞれ1〜50%、20〜100℃であり、エッチング時のAlの溶解量が5〜20g/m2となるような条件を選択することが好ましい。 In general, the aluminum alloy plate thus roughened is chemically etched with acid or alkali as a second step of roughening. When an acid is used as an etching agent, it takes a long time to destroy the fine structure, which is industrially disadvantageous, but it can be improved by using an alkali as the etching agent. As an alkali agent for etching, caustic soda, sodium carbonate, sodium aluminate, sodium metasilicate, sodium phosphate, potassium hydroxide, lithium hydroxide, etc. can be used, and the preferred ranges of concentration and temperature are respectively It is preferable that the conditions be 1 to 50%, 20 to 100 ° C., and the conditions that the dissolution amount of Al during etching is 5 to 20 g / m 2 .
エッチング後には、表面に残留する汚れ(スマット)を除去するために酸洗浄を行なうのが通常である。酸洗浄に用いる酸としては硝酸、硫酸、リン酸、クロム酸、フッ酸およびホウフッ化水素酸などがある。特に電気化学的粗面化処理後のスマット除去には、好ましくは特開昭53−12739号公報に記載されているような50〜90℃の温度の15〜65重量%の硝酸と接触させる方法、及び特公昭48−28123号公報に記載されているアルカリエッチングする方法がある。 After the etching, acid cleaning is usually performed to remove dirt (smut) remaining on the surface. Examples of the acid used for the acid cleaning include nitric acid, sulfuric acid, phosphoric acid, chromic acid, hydrofluoric acid, and borohydrofluoric acid. In particular, for removing smut after the electrochemical surface roughening treatment, a method of contacting with 15 to 65% by weight of nitric acid at a temperature of 50 to 90 ° C. as described in JP-A-53-12739 is preferable. In addition, there is an alkali etching method described in Japanese Patent Publication No. 48-28123.
以上のようにして処理されたアルミニウム合金板は、平版印刷版用支持体として使用することができるが、通常はさらに陽極酸化処理、苛性処理等の処理を施すことが望ましい。陽極酸化処理は、この分野で従来より行われている方法で行うことができる。具体的には、硫酸、リン酸、クロム酸、シュウ酸、スルファミン酸、ベンゼンスルフォン酸等あるいはこれらの2種以上を組み合わせた水溶液または非水溶液中で、アルミニウム合金板に直流または交流を流すことにより表面に陽極酸化皮膜を形成することができる。陽極酸化の条件は、使用される電解液によって種々変化するから一概には決められないが、一般には、電解液濃度1〜80%、液温5〜70℃、電流密度0.5〜60A/dm2、電圧1〜100V、電解時間10〜100秒の範囲とすることが適当である。 The aluminum alloy plate treated as described above can be used as a support for a lithographic printing plate, but it is usually desirable to perform further treatments such as anodizing treatment and caustic treatment. The anodizing treatment can be performed by a method conventionally used in this field. Specifically, by flowing direct current or alternating current through an aluminum alloy plate in an aqueous solution or non-aqueous solution of sulfuric acid, phosphoric acid, chromic acid, oxalic acid, sulfamic acid, benzenesulfonic acid, etc., or a combination of two or more thereof. An anodized film can be formed on the surface. The conditions for anodization vary depending on the electrolyte used, and are not generally determined. In general, however, the electrolyte concentration is 1 to 80%, the solution temperature is 5 to 70 ° C., and the current density is 0.5 to 60 A / day. dm 2 , voltage 1 to 100 V, and electrolysis time 10 to 100 seconds are appropriate.
以上のようにして得られた平版印刷版用アルミニウム合金板支持体をPS版に仕上げるにあたっては、常法に従って感光層、または中間層と感光層を塗布して乾燥させればよい。 In finishing the lithographic printing plate aluminum alloy plate support obtained as described above into a PS plate, a photosensitive layer or an intermediate layer and a photosensitive layer may be applied and dried according to a conventional method.
Fe、Si、Cu、Tiの各元素を表1のNo.1〜No.9に示すように含有し、その他の元素をJIS1050合金組成に調整し、残部がAlよりなるアルミニウム合金を、常法に従ってDC鋳造して、厚さ600mmの鋳塊とし、その鋳塊について560℃×3時間保持の均質化処理を施した後、500℃で熱間圧延(熱間粗圧延+熱間仕上げ圧延)を開始して、表2に示す条件により熱間圧延し、得られた熱延板に対して、中間焼鈍を施すことなく冷間圧延により最終板厚(0.3mm)まで圧延し、製品板(平版印刷版用アルミニウム合金板)を得た。 Each element of Fe, Si, Cu, and Ti is designated as No. 1 in Table 1. 1-No. As shown in Fig. 9, the other elements are adjusted to a JIS1050 alloy composition, and the balance is made by DC casting an aluminum alloy made of Al to form a 600 mm thick ingot, and the ingot is 560 ° C. X After 3 hours of homogenization, hot rolling (hot rough rolling + hot finish rolling) was started at 500 ° C, and hot rolling was performed under the conditions shown in Table 2 to obtain the obtained heat. The rolled plate was rolled to the final plate thickness (0.3 mm) by cold rolling without performing intermediate annealing to obtain a product plate (aluminum alloy plate for lithographic printing plate).
上述の製造プロセスにおいて、熱間圧延後、室温まで冷却された熱延板の冷間圧延前の板について、キューブ方位占有率を調べ、また冷間圧延後の製品板について、板表面の結晶粒平均サイズ(圧延方向と平行な方向および垂直な方向)を調べるとともに、結晶粒の平均面積を求めたので、その結果を表3に示す。 In the manufacturing process described above, after hot rolling, the cube orientation occupancy ratio of the hot-rolled sheet cooled to room temperature before cold rolling is examined, and for the product sheet after cold rolling, crystal grains on the plate surface The average size (direction parallel to the rolling direction and the direction perpendicular to the rolling direction) was examined, and the average area of the crystal grains was determined. The results are shown in Table 3.
ここで、キューブ方位占有率はEBSPにより方位解析を行ない、回転軸が5°までをキューブ方位とみなして求めた。また製品板表面の結晶粒サイズは、板表面をバーカー法によりエッチングした後、偏光下で顕微鏡観察して20倍写真を撮影後、交線法により求めた。さらに製品板の結晶粒の面積率は、結晶粒の垂直な方向の長さ(LT)と、平行な方向の長さ(L)とを掛け合わせ、LT×Lの値により求めた。 Here, the cube orientation occupancy was obtained by performing orientation analysis by EBSP and regarding the rotation axis up to 5 ° as the cube orientation. The crystal grain size on the surface of the product plate was obtained by the cross line method after etching the plate surface by the Barker method, observing under a microscope under polarized light and taking a 20 × photograph. Further, the area ratio of the crystal grains of the product plate was obtained by multiplying the length (LT) in the vertical direction of the crystal grains and the length (L) in the parallel direction by a value of LT × L.
さらに前述のようにして得られた各製品板(アルミニウム合金板)について、アルカリエッチング及びデスマット処理を施した後、極性が交互に交換する電解波形を持つ電源を用いて、1%硝酸中で陽極時電気量が150C/dm2となる電解エッチングにより電解粗面化を行った。これを硫酸浴中にて洗浄した後、以下のA、Bの要領でストリーク発生の有無、外観の均一性を評価し、表4中に示した。 Further, each product plate (aluminum alloy plate) obtained as described above was subjected to alkali etching and desmutting treatment, and then an anode in 1% nitric acid using a power source having an electrolytic waveform in which polarities were alternately exchanged. Electrolytic surface roughening was performed by electrolytic etching in which the amount of electricity was 150 C / dm 2 . After washing in a sulfuric acid bath, the presence or absence of streak and the appearance uniformity were evaluated according to the following procedures A and B, and are shown in Table 4.
A:ストリーク発生の有無
粗面化処理後の外観について目視で観察し、ストリークの発生が見られないものを○、発生が確認されるものを×とした。
A: Presence / absence of streak The appearance after the surface roughening treatment was visually observed.
B:外観の均一性
粗面化処理後の外観について目視で観察し、均一性が良好なものを○、劣っているものを×とした。
B: Uniformity of appearance The appearance after the roughening treatment was visually observed.
表4から明らかなように、この発明の条件を外れて得られた比較例(No.5〜No.9)の平版印刷版用アルミニウム合金板は、粗面化処理後の表面にストリークが発生したり、外観の均一性に欠けたりすることが確認された。これに対し、この発明の条件を満たして得られた平版印刷版用アルミニウム合金板は、粗面化処理後の表面にストリークの発生が見られず、また面質ムラや処理ムラも発生せず、良好な処理面を有していることが確認された。 As apparent from Table 4, the aluminum alloy plates for lithographic printing plates of Comparative Examples (No. 5 to No. 9) obtained outside the conditions of the present invention have streaks on the surface after the roughening treatment. It was confirmed that the appearance was not uniform. On the other hand, the lithographic printing plate aluminum alloy plate obtained by satisfying the conditions of the present invention shows no occurrence of streaks on the surface after the surface roughening treatment, and does not cause surface quality unevenness or processing unevenness. It was confirmed to have a good treated surface.
Claims (4)
ta/tb>10
以上を満足するように規制し、かつ熱間仕上げ圧延上り板厚tbが1.2〜4.0mmの範囲内、熱間仕上げ圧延上り温度が300〜360℃の範囲内となるように熱間圧延して再結晶を生起させ、しかも熱間仕上げ圧延直後から300℃未満の温度域まで板温度が降下する時間を4時間以内に規制して、再結晶後の板表面の結晶方位におけるキューブ方位密度占有率が10%以上である熱延板を得、その後、中間焼鈍を施すことなく冷間圧延により製品板厚とし、これによって結晶粒の平均面積が0.1mm2以下であり、しかも結晶粒の圧延方向と平行な方向の平均長さが1300μm以下のアルミニウム合金板を得ることを特徴とする、平版印刷版用アルミニウム合金板の製造方法。 Aluminum alloy containing Fe 0.1 to 0.5%, Si 0.05 to 0.20%, Cu 0.005 to 0.07%, Ti 0.005 to 0.08%, the balance being Al and inevitable impurities When the hot ingot comprising hot rough rolling and hot finish rolling is applied to the ingot, the amount of hot finish rolling reduction is determined by determining the hot rough rolled up plate thickness ta (mm) and the hot finish rolled up plate. The ratio ta / tb to the thickness tb (mm) is
ta / tb> 10
It is controlled so as to satisfy the above, and the hot finish rolled up thickness tb is in the range of 1.2 to 4.0 mm, and the hot finish rolled up temperature is in the range of 300 to 360 ° C. Cube orientation in the crystal orientation of the plate surface after recrystallization is controlled by controlling the time for the plate temperature to fall within 4 hours from immediately after hot finish rolling to a temperature range of less than 300 ° C. A hot-rolled sheet having a density occupancy of 10% or more is obtained, and then the product sheet thickness is obtained by cold rolling without intermediate annealing, whereby the average area of crystal grains is 0.1 mm 2 or less, and the crystal A method for producing an aluminum alloy plate for a lithographic printing plate, comprising obtaining an aluminum alloy plate having an average length in a direction parallel to the rolling direction of grains of 1300 µm or less.
結晶粒の平均面積率が0.1mm2以下であり、しかも結晶粒の圧延方向と平行な方向の平均長さが1300μm以下でかつ結晶粒の圧延方向と垂直な方向の平均長さが100μm以下のアルミニウム合金板を得ることを特徴とする、平版印刷版用アルミニウム合金板の製造方法。 In the manufacturing method of the aluminum alloy plate for lithographic printing plates of Claim 3,
The average area ratio of the crystal grains is 0.1 mm 2 or less, and the average length in the direction parallel to the rolling direction of the crystal grains is 1300 μm or less, and the average length in the direction perpendicular to the rolling direction of the crystal grains is 100 μm or less. A method for producing an aluminum alloy plate for a lithographic printing plate, characterized in that the aluminum alloy plate is obtained.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005369166A JP4714576B2 (en) | 2005-12-22 | 2005-12-22 | Aluminum alloy plate for lithographic printing plate and method for producing the same |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005369166A JP4714576B2 (en) | 2005-12-22 | 2005-12-22 | Aluminum alloy plate for lithographic printing plate and method for producing the same |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2007169719A true JP2007169719A (en) | 2007-07-05 |
JP4714576B2 JP4714576B2 (en) | 2011-06-29 |
Family
ID=38296660
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2005369166A Active JP4714576B2 (en) | 2005-12-22 | 2005-12-22 | Aluminum alloy plate for lithographic printing plate and method for producing the same |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP4714576B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009280885A (en) * | 2008-05-26 | 2009-12-03 | Sumitomo Light Metal Ind Ltd | Aluminum sheet having coarse crystal grain, and method for producing the same |
JP2011058049A (en) * | 2009-09-10 | 2011-03-24 | Furukawa-Sky Aluminum Corp | Aluminum alloy plate for lithographic printing plate and method for producing the same |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH10297129A (en) * | 1997-04-22 | 1998-11-10 | Fuji Photo Film Co Ltd | Support for lithographic printing plate |
JP2000037964A (en) * | 1998-07-24 | 2000-02-08 | Fuji Photo Film Co Ltd | Lithographic printing plate substrate |
JP2002307849A (en) * | 2001-02-09 | 2002-10-23 | Fuji Photo Film Co Ltd | Lithographic printing plate original plate |
JP2003328094A (en) * | 2002-05-17 | 2003-11-19 | Sky Alum Co Ltd | Production method for rolled aluminum alloy plate for lithographic printing form plate support |
JP2003342658A (en) * | 2002-03-12 | 2003-12-03 | Sky Alum Co Ltd | Aluminum alloy plate for lithographic printing plate support and method for producing the same |
JP2005319495A (en) * | 2004-05-11 | 2005-11-17 | Kobe Steel Ltd | Method of hot finish rolling, and material rolled by the same |
-
2005
- 2005-12-22 JP JP2005369166A patent/JP4714576B2/en active Active
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH10297129A (en) * | 1997-04-22 | 1998-11-10 | Fuji Photo Film Co Ltd | Support for lithographic printing plate |
JP2000037964A (en) * | 1998-07-24 | 2000-02-08 | Fuji Photo Film Co Ltd | Lithographic printing plate substrate |
JP2002307849A (en) * | 2001-02-09 | 2002-10-23 | Fuji Photo Film Co Ltd | Lithographic printing plate original plate |
JP2003342658A (en) * | 2002-03-12 | 2003-12-03 | Sky Alum Co Ltd | Aluminum alloy plate for lithographic printing plate support and method for producing the same |
JP2003328094A (en) * | 2002-05-17 | 2003-11-19 | Sky Alum Co Ltd | Production method for rolled aluminum alloy plate for lithographic printing form plate support |
JP2005319495A (en) * | 2004-05-11 | 2005-11-17 | Kobe Steel Ltd | Method of hot finish rolling, and material rolled by the same |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009280885A (en) * | 2008-05-26 | 2009-12-03 | Sumitomo Light Metal Ind Ltd | Aluminum sheet having coarse crystal grain, and method for producing the same |
JP2011058049A (en) * | 2009-09-10 | 2011-03-24 | Furukawa-Sky Aluminum Corp | Aluminum alloy plate for lithographic printing plate and method for producing the same |
Also Published As
Publication number | Publication date |
---|---|
JP4714576B2 (en) | 2011-06-29 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP2767711B2 (en) | Method for producing a lithographic printing plate support | |
JPH1161364A (en) | Manufacture of aluminum alloy support for lithographic printing plate and aluminum alloy support for lithographic printing plate | |
JPH07305133A (en) | Supporting body for planographic printing plate and its production | |
JP4181596B2 (en) | High-strength aluminum alloy plate for printing plates | |
JP4714576B2 (en) | Aluminum alloy plate for lithographic printing plate and method for producing the same | |
JP4181597B2 (en) | High-strength aluminum alloy plate for printing plates | |
JP2791729B2 (en) | Method for producing a lithographic printing plate support | |
JP3177079B2 (en) | Method for producing a lithographic printing plate support | |
JP3148057B2 (en) | Method for producing a lithographic printing plate support | |
JP2000108534A (en) | Support for lithographic printing plate | |
JP5080160B2 (en) | Aluminum alloy plate for lithographic printing plate and method for producing the same | |
JP4016310B2 (en) | Aluminum alloy support for lithographic printing plate and method for producing base plate for support | |
JPS6274693A (en) | Aluminum alloy support for offset print | |
JPH05301478A (en) | Support of planograpahic printing plate and production thereof | |
JPH04254545A (en) | Aluminum alloy substrate for planographic printing plate | |
JP5495298B2 (en) | Aluminum alloy plate for lithographic printing plate and method for producing the same | |
JP4593332B2 (en) | Method for producing aluminum alloy plate for lithographic printing plate | |
JP5209918B2 (en) | Aluminum alloy plate for lithographic printing plate and method for producing the same | |
JP2001191654A (en) | Method for manufacturing rolled plate of molten aluminum alloy for ps plate support, and rolled plate of molten aluminum alloy for ps plate support | |
JP2002160466A (en) | Support for lithographic printing plate | |
JP4832779B2 (en) | Aluminum alloy plate for lithographic printing plate and method for producing the same | |
JP3662418B2 (en) | Support for lithographic printing plate | |
JPH07132689A (en) | Aluminum alloy substrate for lithographic plate | |
JPH10297129A (en) | Support for lithographic printing plate | |
JP2007204775A (en) | Aluminum alloy plate for lithographic printing plate and its production method |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20080930 |
|
A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20081126 |
|
RD01 | Notification of change of attorney |
Free format text: JAPANESE INTERMEDIATE CODE: A7426 Effective date: 20100604 |
|
RD03 | Notification of appointment of power of attorney |
Free format text: JAPANESE INTERMEDIATE CODE: A7423 Effective date: 20100604 |
|
A711 | Notification of change in applicant |
Free format text: JAPANESE INTERMEDIATE CODE: A712 Effective date: 20100916 |
|
A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A821 Effective date: 20100916 |
|
A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20110310 |
|
TRDD | Decision of grant or rejection written | ||
A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20110322 |
|
A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20110328 |
|
R150 | Certificate of patent or registration of utility model |
Ref document number: 4714576 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
S531 | Written request for registration of change of domicile |
Free format text: JAPANESE INTERMEDIATE CODE: R313531 |
|
S533 | Written request for registration of change of name |
Free format text: JAPANESE INTERMEDIATE CODE: R313533 |
|
R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |